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  <a href="#_7" class="md-nav__link">
    📌 等待下载开始
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#waitdownload_begin" class="md-nav__link">
    🔸 wait.download_begin()
  </a>
  
</li>
        
      </ul>
    </nav>
  
</li>
      
        <li class="md-nav__item">
  <a href="#_8" class="md-nav__link">
    ✅️️ 查看任务信息
  </a>
  
    <nav class="md-nav" aria-label="✅️️ 查看任务信息">
      <ul class="md-nav__list">
        
          <li class="md-nav__item">
  <a href="#_9" class="md-nav__link">
    📌 获取单个任务对象
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#_10" class="md-nav__link">
    📌 获取全部任务对象
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#_11" class="md-nav__link">
    📌 获取下载失败的任务
  </a>
  
</li>
        
      </ul>
    </nav>
  
</li>
      
        <li class="md-nav__item">
  <a href="#_12" class="md-nav__link">
    ✅️️ 下载设置
  </a>
  
    <nav class="md-nav" aria-label="✅️️ 下载设置">
      <ul class="md-nav__list">
        
          <li class="md-nav__item">
  <a href="#_13" class="md-nav__link">
    📌 设置文件保存路径
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#download_setsave_path" class="md-nav__link">
    🔸 download_set.save_path()
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#_14" class="md-nav__link">
    📌 设置下载方式
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#download_setby_downloadkit" class="md-nav__link">
    🔸 download_set.by_DownloadKit()
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#download_setby_browser" class="md-nav__link">
    🔸 download_set.by_browser()
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#_15" class="md-nav__link">
    📌 设置重名文件处理方法
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#download_setif_file_existsrename" class="md-nav__link">
    🔸 download_set.if_file_exists.rename()
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#download_setif_file_existsskip" class="md-nav__link">
    🔸 download_set.if_file_exists.skip()
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#download_setif_file_existsoverwrite" class="md-nav__link">
    🔸 download_set.if_file_exists.overwrite()
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#_16" class="md-nav__link">
    📌 设置大文件是否分块
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#download_setsplit" class="md-nav__link">
    🔸 download_set.split()
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#_17" class="md-nav__link">
    📌运行参数设置
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#downloadroads" class="md-nav__link">
    🔸 download.roads
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#downloadretry" class="md-nav__link">
    🔸 download.retry
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#downloadinterval" class="md-nav__link">
    🔸 download.interval
  </a>
  
</li>
        
      </ul>
    </nav>
  
</li>
      
    </ul>
  
</nav>
      
    </li>
  

            
          
            
              
  
  
  
    <li class="md-nav__item">
      <a href="../errors/" class="md-nav__link">
        ⚙️ 异常的使用
      </a>
    </li>
  

            
          
            
              
  
  
  
    <li class="md-nav__item">
      <a href="../commands/" class="md-nav__link">
        ⚙️ 命令行的使用
      </a>
    </li>
  

            
          
            
              
  
  
  
    <li class="md-nav__item">
      <a href="../accelerate_collecting/" class="md-nav__link">
        ⚙️ 加速浏览器数据采集
      </a>
    </li>
  

            
          
            
              
  
  
  
    <li class="md-nav__item">
      <a href="../packaging/" class="md-nav__link">
        ⚙️ 打包程序
      </a>
    </li>
  

            
          
            
              
  
  
  
    <li class="md-nav__item">
      <a href="../monitor_network/" class="md-nav__link">
        ⚙️ 监听浏览器网络
      </a>
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    <li class="md-nav__item md-nav__item--nested">
      
      
      
      
      <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_4_6" >
      
      
      
        <label class="md-nav__link" for="__nav_4_6" id="__nav_4_6_label" tabindex="0">
          🛠 旧版（MixPage）
          <span class="md-nav__icon md-icon"></span>
        </label>
      
      <nav class="md-nav" data-md-level="2" aria-labelledby="__nav_4_6_label" aria-expanded="false">
        <label class="md-nav__title" for="__nav_4_6">
          <span class="md-nav__icon md-icon"></span>
          🛠 旧版（MixPage）
        </label>
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      <a href="../../MixPage/introduction/" class="md-nav__link">
        🔨 概述
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    <li class="md-nav__item md-nav__item--nested">
      
      
      
      
      <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_5" >
      
      
      
        <label class="md-nav__link" for="__nav_5" id="__nav_5_label" tabindex="0">
          示例和技巧
          <span class="md-nav__icon md-icon"></span>
        </label>
      
      <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_5_label" aria-expanded="false">
        <label class="md-nav__title" for="__nav_5">
          <span class="md-nav__icon md-icon"></span>
          示例和技巧
        </label>
        <ul class="md-nav__list" data-md-scrollfix>
          
            
              
  
  
  
    <li class="md-nav__item">
      <a href="../../demos/login_gitee/" class="md-nav__link">
        🌠 自动登录码云
      </a>
    </li>
  

            
          
            
              
  
  
  
    <li class="md-nav__item">
      <a href="../../demos/maoyan_TOP100/" class="md-nav__link">
        🌠 采集猫眼电影 TOP100 榜
      </a>
    </li>
  

            
          
            
              
  
  
  
    <li class="md-nav__item">
      <a href="../../demos/starbucks_pics/" class="md-nav__link">
        🌠 下载星巴克产品图片
      </a>
    </li>
  

            
          
            
              
  
  
  
    <li class="md-nav__item">
      <a href="../../demos/douban_book_pics/" class="md-nav__link">
        🌠 下载豆瓣图书封面图片
      </a>
    </li>
  

            
          
            
              
  
  
  
    <li class="md-nav__item">
      <a href="../../demos/multithreading_with_tabs/" class="md-nav__link">
        🌠 多线程操作多标签页
      </a>
    </li>
  

            
          
        </ul>
      </nav>
    </li>
  

    
      
      
      

  
  
  
    
    <li class="md-nav__item md-nav__item--nested">
      
      
      
      
      <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_6" >
      
      
      
        <label class="md-nav__link" for="__nav_6" id="__nav_6_label" tabindex="0">
          版本历史
          <span class="md-nav__icon md-icon"></span>
        </label>
      
      <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_6_label" aria-expanded="false">
        <label class="md-nav__title" for="__nav_6">
          <span class="md-nav__icon md-icon"></span>
          版本历史
        </label>
        <ul class="md-nav__list" data-md-scrollfix>
          
            
              
  
  
  
    <li class="md-nav__item">
      <a href="../../history/3.x/" class="md-nav__link">
        v3.x
      </a>
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      <a href="../../history/2.x/" class="md-nav__link">
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    <li class="md-nav__item">
      <a href="https://gitee.com/g1879/DrissionPage/issues" class="md-nav__link">
        意见建议
      </a>
    </li>
  

    
  </ul>
</nav>
                  </div>
                </div>
              </div>
            
            
              
              <div class="md-sidebar md-sidebar--secondary" data-md-component="sidebar" data-md-type="toc" >
                <div class="md-sidebar__scrollwrap">
                  <div class="md-sidebar__inner">
                    

<nav class="md-nav md-nav--secondary" aria-label="Table of contents">
  
  
  
  
    <label class="md-nav__title" for="__toc">
      <span class="md-nav__icon md-icon"></span>
      Table of contents
    </label>
    <ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
      
        <li class="md-nav__item">
  <a href="#_1" class="md-nav__link">
    ✅️️ 功能简介
  </a>
  
</li>
      
        <li class="md-nav__item">
  <a href="#_2" class="md-nav__link">
    ✅️️ 简单示例
  </a>
  
</li>
      
        <li class="md-nav__item">
  <a href="#_3" class="md-nav__link">
    ✅️️ 单线程下载
  </a>
  
    <nav class="md-nav" aria-label="✅️️ 单线程下载">
      <ul class="md-nav__list">
        
          <li class="md-nav__item">
  <a href="#download" class="md-nav__link">
    🔸 download()
  </a>
  
</li>
        
      </ul>
    </nav>
  
</li>
      
        <li class="md-nav__item">
  <a href="#_4" class="md-nav__link">
    ✅️️ 多线程并发下载
  </a>
  
    <nav class="md-nav" aria-label="✅️️ 多线程并发下载">
      <ul class="md-nav__list">
        
          <li class="md-nav__item">
  <a href="#downloadadd" class="md-nav__link">
    🔸 download.add()
  </a>
  
</li>
        
      </ul>
    </nav>
  
</li>
      
        <li class="md-nav__item">
  <a href="#_5" class="md-nav__link">
    ✅️️ 接管浏览器下载任务
  </a>
  
    <nav class="md-nav" aria-label="✅️️ 接管浏览器下载任务">
      <ul class="md-nav__list">
        
          <li class="md-nav__item">
  <a href="#_6" class="md-nav__link">
    📌 切换下载方式
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#_7" class="md-nav__link">
    📌 等待下载开始
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#waitdownload_begin" class="md-nav__link">
    🔸 wait.download_begin()
  </a>
  
</li>
        
      </ul>
    </nav>
  
</li>
      
        <li class="md-nav__item">
  <a href="#_8" class="md-nav__link">
    ✅️️ 查看任务信息
  </a>
  
    <nav class="md-nav" aria-label="✅️️ 查看任务信息">
      <ul class="md-nav__list">
        
          <li class="md-nav__item">
  <a href="#_9" class="md-nav__link">
    📌 获取单个任务对象
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#_10" class="md-nav__link">
    📌 获取全部任务对象
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#_11" class="md-nav__link">
    📌 获取下载失败的任务
  </a>
  
</li>
        
      </ul>
    </nav>
  
</li>
      
        <li class="md-nav__item">
  <a href="#_12" class="md-nav__link">
    ✅️️ 下载设置
  </a>
  
    <nav class="md-nav" aria-label="✅️️ 下载设置">
      <ul class="md-nav__list">
        
          <li class="md-nav__item">
  <a href="#_13" class="md-nav__link">
    📌 设置文件保存路径
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#download_setsave_path" class="md-nav__link">
    🔸 download_set.save_path()
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#_14" class="md-nav__link">
    📌 设置下载方式
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#download_setby_downloadkit" class="md-nav__link">
    🔸 download_set.by_DownloadKit()
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#download_setby_browser" class="md-nav__link">
    🔸 download_set.by_browser()
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#_15" class="md-nav__link">
    📌 设置重名文件处理方法
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#download_setif_file_existsrename" class="md-nav__link">
    🔸 download_set.if_file_exists.rename()
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#download_setif_file_existsskip" class="md-nav__link">
    🔸 download_set.if_file_exists.skip()
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#download_setif_file_existsoverwrite" class="md-nav__link">
    🔸 download_set.if_file_exists.overwrite()
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#_16" class="md-nav__link">
    📌 设置大文件是否分块
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#download_setsplit" class="md-nav__link">
    🔸 download_set.split()
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#_17" class="md-nav__link">
    📌运行参数设置
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#downloadroads" class="md-nav__link">
    🔸 download.roads
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#downloadretry" class="md-nav__link">
    🔸 download.retry
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#downloadinterval" class="md-nav__link">
    🔸 download.interval
  </a>
  
</li>
        
      </ul>
    </nav>
  
</li>
      
    </ul>
  
</nav>
                  </div>
                </div>
              </div>
            
          
          
            <div class="md-content" data-md-component="content">
              <article class="md-content__inner md-typeset">
                
                  



  <h1>⚙️ 下载文件</h1>

<p>浏览器没有为下载功能提供方便的程序接口，难以实现有效的下载管理，如检测下载状态、重命名、失败管理等。使用 requests 下载文件能较好实现以上功能，但代码较为繁琐。<br />
因此 DrissionPage 内置了高效可靠的下载工具，提供任务管理、多线程、大文件分块、自动重连、文件名冲突处理等功能。</p>
<p>无论是控制浏览器，还是收发数据包的场景，都可以使用它。甚至可以拦截浏览器的下载动作，转用内置下载器进行下载。使用方式简洁高效。</p>
<div class="admonition note">
<p class="admonition-title">说明：</p>
<p>该工具名为 DownloadKit，现已独立打包成一个库，详细用法见：<a href="https://gitee.com/g1879/DownloadKit">DownloadKit</a>。这里只介绍和页面对象有关的用法。</p>
</div>
<h2 id="_1">✅️️ 功能简介</h2>
<p><code>SessionPage</code>、<code>ChromiumPage</code>、<code>WebPage</code>都可以使用<code>download()</code>方法进行下载，还可以使用<code>download_set</code>属性对下载参数进行配置。内置下载器功能如下：</p>
<ul>
<li>支持多线程同时下载多个文件</li>
<li>大文件自动分块使用多线程下载</li>
<li>可拦截浏览器下载动作，自动调用下载器下载</li>
<li>自动创建目标路径</li>
<li>自动去除路径中的非法字符</li>
<li>下载时支持文件重命名</li>
<li>自动处理文件名冲突</li>
<li>自动去除文件名非法字符</li>
<li>支持 post 方式</li>
<li>支持自定义连接参数</li>
<li>任务失败自动重试</li>
</ul>
<hr />
<h2 id="_2">✅️️ 简单示例</h2>
<p>下载一个文件（单线程）：</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a><span class="n">page</span><span class="o">.</span><span class="n">download</span><span class="p">(</span><span class="s1">&#39;https://xxxxxx/file.pdf&#39;</span><span class="p">)</span>
</code></pre></div>
<p>添加下载任务，以多线程方式下载：</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-1-1" name="__codelineno-1-1" href="#__codelineno-1-1"></a><span class="n">page</span><span class="o">.</span><span class="n">download</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="s1">&#39;https://xxxxxx/file.pdf&#39;</span><span class="p">)</span>
</code></pre></div>
<p>拦截浏览器下载动作，改用 DwonloadKit 下载：</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-2-1" name="__codelineno-2-1" href="#__codelineno-2-1"></a><span class="n">page</span><span class="o">.</span><span class="n">download_set</span><span class="o">.</span><span class="n">by_DownloadKit</span><span class="p">()</span>
<a id="__codelineno-2-2" name="__codelineno-2-2" href="#__codelineno-2-2"></a><span class="n">page</span><span class="p">(</span><span class="s1">&#39;#download_btn&#39;</span><span class="p">)</span><span class="o">.</span><span class="n">click</span><span class="p">()</span>
</code></pre></div>
<p>下载设置：</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-3-1" name="__codelineno-3-1" href="#__codelineno-3-1"></a><span class="c1"># 设置默认保存路径</span>
<a id="__codelineno-3-2" name="__codelineno-3-2" href="#__codelineno-3-2"></a><span class="n">page</span><span class="o">.</span><span class="n">download_set</span><span class="o">.</span><span class="n">save_path</span><span class="p">(</span><span class="s1">&#39;...&#39;</span><span class="p">)</span>
<a id="__codelineno-3-3" name="__codelineno-3-3" href="#__codelineno-3-3"></a><span class="c1"># 设置存在同名文件时处理方式</span>
<a id="__codelineno-3-4" name="__codelineno-3-4" href="#__codelineno-3-4"></a><span class="n">page</span><span class="o">.</span><span class="n">download_set</span><span class="o">.</span><span class="n">if_file_exists</span><span class="o">.</span><span class="n">skip</span><span class="p">()</span>
<a id="__codelineno-3-5" name="__codelineno-3-5" href="#__codelineno-3-5"></a><span class="c1"># 设置使用浏览器或DownloadKit下载</span>
<a id="__codelineno-3-6" name="__codelineno-3-6" href="#__codelineno-3-6"></a><span class="n">page</span><span class="o">.</span><span class="n">download_set</span><span class="o">.</span><span class="n">by_DownloadKit</span><span class="p">()</span>
<a id="__codelineno-3-7" name="__codelineno-3-7" href="#__codelineno-3-7"></a><span class="n">page</span><span class="o">.</span><span class="n">download_set</span><span class="o">.</span><span class="n">by_browser</span><span class="p">()</span>
<a id="__codelineno-3-8" name="__codelineno-3-8" href="#__codelineno-3-8"></a><span class="c1"># 设置使用DownloadKit下载时是否允许多线程同时下载一个文件</span>
<a id="__codelineno-3-9" name="__codelineno-3-9" href="#__codelineno-3-9"></a><span class="n">page</span><span class="o">.</span><span class="n">download_set</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="kc">True</span><span class="p">)</span>
</code></pre></div>
<hr />
<h2 id="_3">✅️️ 单线程下载</h2>
<p>直接调用页面对象的<code>download()</code>方法，可下载一个文件，该方法是阻塞式的，会等待下载完成再往下操作。下载时默认打印下载进度。</p>
<h3 id="download">🔸 <code>download()</code></h3>
<table>
<thead>
<tr>
<th align="center">参数名称</th>
<th align="center">类型</th>
<th align="center">默认值</th>
<th>说明</th>
</tr>
</thead>
<tbody>
<tr>
<td align="center"><code>file_url</code></td>
<td align="center"><code>str</code></td>
<td align="center">必填</td>
<td>文件网址</td>
</tr>
<tr>
<td align="center"><code>goal_path</code></td>
<td align="center"><code>str</code><br><code>Path</code></td>
<td align="center"><code>None</code></td>
<td>保存文件夹路径，为<code>None</code>则保存在当前目录</td>
</tr>
<tr>
<td align="center"><code>rename</code></td>
<td align="center"><code>str</code></td>
<td align="center"><code>None</code></td>
<td>重命名文件名，可不包含后缀</td>
</tr>
<tr>
<td align="center"><code>file_exists</code></td>
<td align="center"><code>str</code></td>
<td align="center"><code>None</code></td>
<td>遇到同名文件时的处理方式，可选<code>'skip'</code>、<code>'overwrite'</code>、<code>'rename'</code></td>
</tr>
<tr>
<td align="center"><code>data</code></td>
<td align="center"><code>str</code><br><code>dict</code></td>
<td align="center"><code>None</code></td>
<td>post 方式使用的数据，如不为<code>None</code>，使用 post 方式发送请求</td>
</tr>
<tr>
<td align="center"><code>show_msg</code></td>
<td align="center"><code>bool</code></td>
<td align="center"><code>True</code></td>
<td>是否显示下载进度</td>
</tr>
<tr>
<td align="center"><code>**kwargs</code></td>
<td align="center">-</td>
<td align="center">必填</td>
<td>requests的<code>get()</code>方法参数</td>
</tr>
</tbody>
</table>
<table>
<thead>
<tr>
<th align="center">返回类型</th>
<th align="center">返回格式</th>
<th>说明</th>
</tr>
</thead>
<tbody>
<tr>
<td align="center"><code>tuple</code></td>
<td align="center">(任务结果, 任务信息)</td>
<td>返回任务结果和信息组成的<code>tuple</code></td>
</tr>
</tbody>
</table>
<p>任务结果可能出现以下值：</p>
<ul>
<li>
<p><code>'success'</code>：表示下载成功</p>
</li>
<li>
<p><code>'skip'</code>：表示存在同名文件，跳过任务</p>
</li>
<li>
<p><code>'cancel'</code>：表示任务下载途中被取消</p>
</li>
<li>
<p><code>False</code>：表示下载失败</p>
</li>
</ul>
<p>任务信息成功时返回文件绝对路径，其它情况返回相应说明。</p>
<p><strong>示例：</strong></p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-4-1" name="__codelineno-4-1" href="#__codelineno-4-1"></a><span class="kn">from</span> <span class="nn">DrissionPage</span> <span class="kn">import</span> <span class="n">WebPage</span>
<a id="__codelineno-4-2" name="__codelineno-4-2" href="#__codelineno-4-2"></a>
<a id="__codelineno-4-3" name="__codelineno-4-3" href="#__codelineno-4-3"></a><span class="n">page</span> <span class="o">=</span> <span class="n">WebPage</span><span class="p">(</span><span class="s1">&#39;s&#39;</span><span class="p">)</span>
<a id="__codelineno-4-4" name="__codelineno-4-4" href="#__codelineno-4-4"></a><span class="c1"># 文件 url</span>
<a id="__codelineno-4-5" name="__codelineno-4-5" href="#__codelineno-4-5"></a><span class="n">url</span> <span class="o">=</span> <span class="s1">&#39;https://www.baidu.com/img/flexible/logo/pc/result.png&#39;</span>  
<a id="__codelineno-4-6" name="__codelineno-4-6" href="#__codelineno-4-6"></a><span class="c1"># 存放路径</span>
<a id="__codelineno-4-7" name="__codelineno-4-7" href="#__codelineno-4-7"></a><span class="n">save_path</span> <span class="o">=</span> <span class="sa">r</span><span class="s1">&#39;C:\download&#39;</span>  
<a id="__codelineno-4-8" name="__codelineno-4-8" href="#__codelineno-4-8"></a>
<a id="__codelineno-4-9" name="__codelineno-4-9" href="#__codelineno-4-9"></a><span class="c1"># 重命名为img.png，存在重名时自动在文件名末尾加上序号，显示下载进度</span>
<a id="__codelineno-4-10" name="__codelineno-4-10" href="#__codelineno-4-10"></a><span class="n">res</span> <span class="o">=</span> <span class="n">page</span><span class="o">.</span><span class="n">download</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="n">save_path</span><span class="p">,</span> <span class="s1">&#39;img&#39;</span><span class="p">,</span> <span class="s1">&#39;rename&#39;</span><span class="p">,</span> <span class="n">show_msg</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<a id="__codelineno-4-11" name="__codelineno-4-11" href="#__codelineno-4-11"></a><span class="c1"># 打印结果</span>
<a id="__codelineno-4-12" name="__codelineno-4-12" href="#__codelineno-4-12"></a><span class="nb">print</span><span class="p">(</span><span class="n">res</span><span class="p">)</span>
</code></pre></div>
<p>显示：</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-5-1" name="__codelineno-5-1" href="#__codelineno-5-1"></a>url：https://www.baidu.com/img/flexible/logo/pc/result.png
<a id="__codelineno-5-2" name="__codelineno-5-2" href="#__codelineno-5-2"></a>文件名：img.png
<a id="__codelineno-5-3" name="__codelineno-5-3" href="#__codelineno-5-3"></a>目标路径：C:<span class="se">\d</span>ownload
<a id="__codelineno-5-4" name="__codelineno-5-4" href="#__codelineno-5-4"></a><span class="m">100</span>%<span class="w"> </span>下载完成<span class="w"> </span>C:<span class="se">\d</span>ownload<span class="se">\i</span>mg.png
<a id="__codelineno-5-5" name="__codelineno-5-5" href="#__codelineno-5-5"></a>
<a id="__codelineno-5-6" name="__codelineno-5-6" href="#__codelineno-5-6"></a><span class="o">(</span><span class="s1">&#39;success&#39;</span>,<span class="w"> </span><span class="s1">&#39;C:\\download\\img.png&#39;</span><span class="o">)</span>
</code></pre></div>
<hr />
<h2 id="_4">✅️️ 多线程并发下载</h2>
<p>您可以添加数量不限的下载任务，程序会自动调配线程去完成这些任务。</p>
<p>默认设置下，页面对象最多使用 10 个下载线程，如进程已满，新任务会进入等待队列排队，待有空线程时自动开始。</p>
<p>添加多线程任务的方法是调用页面对象<code>donwload</code>属性的<code>add()</code>方法。</p>
<h3 id="downloadadd">🔸 <code>download.add()</code></h3>
<table>
<thead>
<tr>
<th align="center">参数名称</th>
<th align="center">类型</th>
<th align="center">默认值</th>
<th>说明</th>
</tr>
</thead>
<tbody>
<tr>
<td align="center"><code>file_url</code></td>
<td align="center"><code>str</code></td>
<td align="center">必填</td>
<td>文件网址</td>
</tr>
<tr>
<td align="center"><code>goal_path</code></td>
<td align="center"><code>str</code><br><code>Path</code></td>
<td align="center"><code>None</code></td>
<td>保存文件夹路径，为<code>None</code>则保存在当前目录</td>
</tr>
<tr>
<td align="center"><code>rename</code></td>
<td align="center"><code>str</code></td>
<td align="center"><code>None</code></td>
<td>重命名文件名，可不包含后缀</td>
</tr>
<tr>
<td align="center"><code>file_exists</code></td>
<td align="center"><code>str</code></td>
<td align="center"><code>None</code></td>
<td>遇到同名文件时的处理方式，可选<code>'skip'</code>、<code>'overwrite'</code>、<code>'rename'</code></td>
</tr>
<tr>
<td align="center"><code>data</code></td>
<td align="center"><code>str</code><br><code>dict</code></td>
<td align="center"><code>None</code></td>
<td>post 方式使用的数据，如不为<code>None</code>，使用 post 方式发送请求</td>
</tr>
<tr>
<td align="center"><code>split</code></td>
<td align="center"><code>bool</code></td>
<td align="center"><code>None</code></td>
<td>是否允许多线程分块下载，为<code>None</code>则使用下载器内置设置，默认为<code>True</code><br>默认大于 50MB 的文件使用多线程分块下载</td>
</tr>
<tr>
<td align="center"><code>**kwargs</code></td>
<td align="center">-</td>
<td align="center">必填</td>
<td>requests的<code>get()</code>方法参数</td>
</tr>
</tbody>
</table>
<table>
<thead>
<tr>
<th align="center">返回类型</th>
<th>说明</th>
</tr>
</thead>
<tbody>
<tr>
<td align="center"><code>Mission</code></td>
<td>返回任务对象，任务对象具体属性及方法详见 <a href="https://gitee.com/g1879/DownloadKit">DownloadKit</a> 相关说明</td>
</tr>
</tbody>
</table>
<p><strong>示例：</strong></p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-6-1" name="__codelineno-6-1" href="#__codelineno-6-1"></a><span class="kn">from</span> <span class="nn">DrissionPage</span> <span class="kn">import</span> <span class="n">WebPage</span>
<a id="__codelineno-6-2" name="__codelineno-6-2" href="#__codelineno-6-2"></a>
<a id="__codelineno-6-3" name="__codelineno-6-3" href="#__codelineno-6-3"></a><span class="n">page</span> <span class="o">=</span> <span class="n">WebPage</span><span class="p">(</span><span class="s1">&#39;s&#39;</span><span class="p">)</span>
<a id="__codelineno-6-4" name="__codelineno-6-4" href="#__codelineno-6-4"></a><span class="c1"># 文件 url</span>
<a id="__codelineno-6-5" name="__codelineno-6-5" href="#__codelineno-6-5"></a><span class="n">url</span> <span class="o">=</span> <span class="s1">&#39;https://www.baidu.com/img/flexible/logo/pc/result.png&#39;</span>  
<a id="__codelineno-6-6" name="__codelineno-6-6" href="#__codelineno-6-6"></a><span class="c1"># 存放路径</span>
<a id="__codelineno-6-7" name="__codelineno-6-7" href="#__codelineno-6-7"></a><span class="n">save_path</span> <span class="o">=</span> <span class="sa">r</span><span class="s1">&#39;C:\download&#39;</span>  
<a id="__codelineno-6-8" name="__codelineno-6-8" href="#__codelineno-6-8"></a>
<a id="__codelineno-6-9" name="__codelineno-6-9" href="#__codelineno-6-9"></a><span class="c1"># 返回一个任务对象</span>
<a id="__codelineno-6-10" name="__codelineno-6-10" href="#__codelineno-6-10"></a><span class="n">mission</span> <span class="o">=</span> <span class="n">page</span><span class="o">.</span><span class="n">download</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="n">save_path</span><span class="p">)</span>
<a id="__codelineno-6-11" name="__codelineno-6-11" href="#__codelineno-6-11"></a>
<a id="__codelineno-6-12" name="__codelineno-6-12" href="#__codelineno-6-12"></a><span class="c1"># 通过任务对象查看状态</span>
<a id="__codelineno-6-13" name="__codelineno-6-13" href="#__codelineno-6-13"></a><span class="nb">print</span><span class="p">(</span><span class="n">mission</span><span class="o">.</span><span class="n">rate</span><span class="p">,</span> <span class="n">mission</span><span class="o">.</span><span class="n">info</span><span class="p">)</span>
</code></pre></div>
<p><strong>输出：</strong></p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-7-1" name="__codelineno-7-1" href="#__codelineno-7-1"></a><span class="m">90</span>%<span class="w"> </span><span class="s1">&#39;下载中&#39;</span>
</code></pre></div>
<hr />
<h2 id="_5">✅️️ 接管浏览器下载任务</h2>
<h3 id="_6">📌 切换下载方式</h3>
<p>很多时候，网站会用某些非显式的方式触发浏览器下载，因此不能很好地获取文件 url，下载依赖浏览器功能。，页面对象可以设置用<code>DownloadKit</code>拦截浏览器的下载任务，使下载更快，下载过程更可控。</p>
<p>方法是使用<code>download_set.by_DownloadKit()</code>方法，指定使用<code>DownloadKit</code>接管浏览器的下载动作。</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-8-1" name="__codelineno-8-1" href="#__codelineno-8-1"></a><span class="n">page</span><span class="o">.</span><span class="n">download_set</span><span class="o">.</span><span class="n">by_DownloadKit</span><span class="p">()</span>
</code></pre></div>
<p>事实上，页面对象创建时就默认开启了此功能，如果想用浏览器本身的下载功能，可以这样写：</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-9-1" name="__codelineno-9-1" href="#__codelineno-9-1"></a><span class="n">page</span><span class="o">.</span><span class="n">download_set</span><span class="o">.</span><span class="n">by_browser</span><span class="p">()</span>
</code></pre></div>
<div class="admonition warning">
<p class="admonition-title">注意</p>
<p>接管浏览器下载任务后会使用 get 方式下载，如果是需要 post 的请求，可能不能正确下载。</p>
</div>
<hr />
<h3 id="_7">📌 等待下载开始</h3>
<p>在浏览器中点击下载按钮后，有时下载不会立即触发，这时如果过快进行其它操作，可能导致一些意想不到的问题。因此设计了<code>wait.download_begin()</code>
方法，用于等待下载动作的开始，以便正确接管。可控制浏览器的页面对象<code>ChromiumPage</code>和<code>WebPage</code>拥有此方法。</p>
<div class="admonition warning">
<p class="admonition-title">注意</p>
<p>如果网站须要很长时间准备下载的文件，请设置一个足够长的超时时间。</p>
</div>
<h3 id="waitdownload_begin">🔸 <code>wait.download_begin()</code></h3>
<p>此方法会阻塞程序，等待下载动作触发。如到达超时时间仍未触发，则返回<code>False</code>。</p>
<table>
<thead>
<tr>
<th align="center">参数名称</th>
<th align="center">类型</th>
<th align="center">默认值</th>
<th>说明</th>
</tr>
</thead>
<tbody>
<tr>
<td align="center"><code>timeout</code></td>
<td align="center"><code>float</code></td>
<td align="center"><code>None</code></td>
<td>等待下载开始的超时时间，为<code>None</code>则使用页面对象<code>timeout</code>属性</td>
</tr>
</tbody>
</table>
<table>
<thead>
<tr>
<th align="center">返回类型</th>
<th>说明</th>
</tr>
</thead>
<tbody>
<tr>
<td align="center"><code>bool</code></td>
<td>是否等到下载开始</td>
</tr>
</tbody>
</table>
<p><strong>示例：</strong></p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-10-1" name="__codelineno-10-1" href="#__codelineno-10-1"></a><span class="n">page</span><span class="p">(</span><span class="s1">&#39;#download_btn&#39;</span><span class="p">)</span><span class="o">.</span><span class="n">click</span><span class="p">()</span>
<a id="__codelineno-10-2" name="__codelineno-10-2" href="#__codelineno-10-2"></a><span class="n">page</span><span class="o">.</span><span class="n">wait</span><span class="o">.</span><span class="n">download_begin</span><span class="p">()</span>
</code></pre></div>
<hr />
<h2 id="_8">✅️️ 查看任务信息</h2>
<p>用单线程方式下载，会阻塞程序直到下载完成，因此无须查看任务信息。</p>
<p>用多线程或接管浏览器下载任务的方式下载，可用以下方式查看任务信息。</p>
<h3 id="_9">📌 获取单个任务对象</h3>
<p>使用<code>download.add()</code>
添加任务时，会返回一个任务对象，后续程序可以使用该对象查询该任务下载进度、结果，也可以取消任务。这里不对该对象作详细说明，详情请移步：<a href="https://gitee.com/g1879/DownloadKit">DownloadKit</a>。</p>
<p><strong>示例：</strong></p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-11-1" name="__codelineno-11-1" href="#__codelineno-11-1"></a><span class="n">mission</span> <span class="o">=</span> <span class="n">page</span><span class="o">.</span><span class="n">download</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="s1">&#39;http://xxxx.pdf&#39;</span><span class="p">)</span>
<a id="__codelineno-11-2" name="__codelineno-11-2" href="#__codelineno-11-2"></a><span class="nb">print</span><span class="p">(</span><span class="n">mission</span><span class="o">.</span><span class="n">id</span><span class="p">)</span>  <span class="c1"># 获取任务id</span>
<a id="__codelineno-11-3" name="__codelineno-11-3" href="#__codelineno-11-3"></a><span class="nb">print</span><span class="p">(</span><span class="n">mission</span><span class="o">.</span><span class="n">rate</span><span class="p">)</span>  <span class="c1"># 打印下载进度（百分比）</span>
<a id="__codelineno-11-4" name="__codelineno-11-4" href="#__codelineno-11-4"></a><span class="nb">print</span><span class="p">(</span><span class="n">mission</span><span class="o">.</span><span class="n">state</span><span class="p">)</span>  <span class="c1"># 打印任务状态，&#39;waiting&#39;、&#39;running&#39;、&#39;done&#39;</span>
<a id="__codelineno-11-5" name="__codelineno-11-5" href="#__codelineno-11-5"></a><span class="nb">print</span><span class="p">(</span><span class="n">mission</span><span class="o">.</span><span class="n">info</span><span class="p">)</span>  <span class="c1"># 打印任务信息</span>
<a id="__codelineno-11-6" name="__codelineno-11-6" href="#__codelineno-11-6"></a><span class="nb">print</span><span class="p">(</span><span class="n">mission</span><span class="o">.</span><span class="n">result</span><span class="p">)</span>  <span class="c1"># 打印任务结果，&#39;success&#39;表示成功，False表示失败，&#39;skip&#39;表示跳过，&#39;cancel&#39;表示取消</span>
</code></pre></div>
<p>除添加任务时获取对象，也可以使用<code>download.get_mission()</code>获取。在上一个示例中可以看到，任务对象有<code>id</code>属性，把任务的<code>id</code>传入此方法，会返回该任务对象。</p>
<p><strong>示例：</strong></p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-12-1" name="__codelineno-12-1" href="#__codelineno-12-1"></a><span class="n">mission_id</span> <span class="o">=</span> <span class="n">mission</span><span class="o">.</span><span class="n">id</span>
<a id="__codelineno-12-2" name="__codelineno-12-2" href="#__codelineno-12-2"></a><span class="n">mission</span> <span class="o">=</span> <span class="n">page</span><span class="o">.</span><span class="n">download</span><span class="o">.</span><span class="n">get_mission</span><span class="p">(</span><span class="n">mission_id</span><span class="p">)</span>
</code></pre></div>
<hr />
<h3 id="_10">📌 获取全部任务对象</h3>
<p>使用页面对象的<code>download.missions</code>属性，可以获取所有下载任务。该属性返回一个<code>dict</code>，保存了所有下载任务。以任务对象的<code>id</code>为 key。</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-13-1" name="__codelineno-13-1" href="#__codelineno-13-1"></a><span class="n">page</span><span class="o">.</span><span class="n">download_set</span><span class="o">.</span><span class="n">save_path</span><span class="p">(</span><span class="sa">r</span><span class="s1">&#39;D:\download&#39;</span><span class="p">)</span>
<a id="__codelineno-13-2" name="__codelineno-13-2" href="#__codelineno-13-2"></a><span class="n">page</span><span class="o">.</span><span class="n">download</span><span class="p">(</span><span class="s1">&#39;http://xxxxx/xxx1.pdf&#39;</span><span class="p">)</span>
<a id="__codelineno-13-3" name="__codelineno-13-3" href="#__codelineno-13-3"></a><span class="n">page</span><span class="o">.</span><span class="n">download</span><span class="p">(</span><span class="s1">&#39;http://xxxxx/xxx1.pdf&#39;</span><span class="p">)</span>
<a id="__codelineno-13-4" name="__codelineno-13-4" href="#__codelineno-13-4"></a><span class="nb">print</span><span class="p">(</span><span class="n">page</span><span class="o">.</span><span class="n">download</span><span class="o">.</span><span class="n">missions</span><span class="p">)</span>
</code></pre></div>
<p><strong>输出：</strong></p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-14-1" name="__codelineno-14-1" href="#__codelineno-14-1"></a>{
<a id="__codelineno-14-2" name="__codelineno-14-2" href="#__codelineno-14-2"></a>    1: &lt;Mission 1 D:\download\xxx1.pdf xxx1.pdf&gt;
<a id="__codelineno-14-3" name="__codelineno-14-3" href="#__codelineno-14-3"></a>    2: &lt;Mission 2 D:\download\xxx1_1.pdf xxx1_1.pdf&gt;
<a id="__codelineno-14-4" name="__codelineno-14-4" href="#__codelineno-14-4"></a>    ...
<a id="__codelineno-14-5" name="__codelineno-14-5" href="#__codelineno-14-5"></a>}
</code></pre></div>
<hr />
<h3 id="_11">📌 获取下载失败的任务</h3>
<p>使用<code>download.get_failed_missions()</code>方法，可以获取下载失败的任务列表。</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-15-1" name="__codelineno-15-1" href="#__codelineno-15-1"></a><span class="n">page</span><span class="o">.</span><span class="n">download_set</span><span class="o">.</span><span class="n">save_path</span><span class="p">(</span><span class="sa">r</span><span class="s1">&#39;D:\download&#39;</span><span class="p">)</span>
<a id="__codelineno-15-2" name="__codelineno-15-2" href="#__codelineno-15-2"></a><span class="n">page</span><span class="o">.</span><span class="n">download</span><span class="p">(</span><span class="s1">&#39;http://xxxxx/xxx1.pdf&#39;</span><span class="p">)</span>
<a id="__codelineno-15-3" name="__codelineno-15-3" href="#__codelineno-15-3"></a><span class="n">page</span><span class="o">.</span><span class="n">download</span><span class="p">(</span><span class="s1">&#39;http://xxxxx/xxx1.pdf&#39;</span><span class="p">)</span>
<a id="__codelineno-15-4" name="__codelineno-15-4" href="#__codelineno-15-4"></a><span class="nb">print</span><span class="p">(</span><span class="n">page</span><span class="o">.</span><span class="n">download</span><span class="o">.</span><span class="n">get_failed_missions</span><span class="p">()</span>
</code></pre></div>
<p><strong>输出：</strong></p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-16-1" name="__codelineno-16-1" href="#__codelineno-16-1"></a>[
<a id="__codelineno-16-2" name="__codelineno-16-2" href="#__codelineno-16-2"></a>    &lt;Mission 1 状态码：404 None&gt;,
<a id="__codelineno-16-3" name="__codelineno-16-3" href="#__codelineno-16-3"></a>    &lt;Mission 2 状态码：404 None&gt;
<a id="__codelineno-16-4" name="__codelineno-16-4" href="#__codelineno-16-4"></a>    ...
<a id="__codelineno-16-5" name="__codelineno-16-5" href="#__codelineno-16-5"></a>]
</code></pre></div>
<div class="admonition tip">
<p class="admonition-title">Tips</p>
<p>获取失败任务对象后，可从其<code>data</code>属性读取任务内容，以便记录日志或择机重试。</p>
</div>
<hr />
<h2 id="_12">✅️️ 下载设置</h2>
<p>主要的下载设置使用<code>download_set</code>内置方法进行，更多运行参数使用<code>download</code>属性的子属性进行。</p>
<h3 id="_13">📌 设置文件保存路径</h3>
<h3 id="download_setsave_path">🔸 <code>download_set.save_path()</code></h3>
<p>此方法用于设置文件下载默认保存路径。</p>
<table>
<thead>
<tr>
<th align="center">参数名称</th>
<th align="center">类型</th>
<th align="center">默认值</th>
<th>说明</th>
</tr>
</thead>
<tbody>
<tr>
<td align="center"><code>path</code></td>
<td align="center"><code>str</code><br><code>Path</code></td>
<td align="center">必填</td>
<td>文件保存路径，绝对路径和相对路径均可</td>
</tr>
</tbody>
</table>
<p><strong>返回：</strong><code>None</code></p>
<p><strong>示例：</strong></p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-17-1" name="__codelineno-17-1" href="#__codelineno-17-1"></a><span class="n">page</span><span class="o">.</span><span class="n">download_set</span><span class="o">.</span><span class="n">save_path</span><span class="p">(</span><span class="sa">r</span><span class="s1">&#39;D:\tmp&#39;</span><span class="p">)</span>
</code></pre></div>
<div class="admonition tip">
<p class="admonition-title">Tips</p>
<ul>
<li>保存路径可指定不存在的文件夹，程序会自动创建。</li>
<li>设置默认保存路径后，每个任务仍可在创建时指定自己的保存路径，以覆盖默认设置。</li>
</ul>
</div>
<hr />
<h3 id="_14">📌 设置下载方式</h3>
<h3 id="download_setby_downloadkit">🔸 <code>download_set.by_DownloadKit()</code></h3>
<p>此方法用于设置当前页面对象使用<code>DownloadKit</code>下载文件。</p>
<h3 id="download_setby_browser">🔸 <code>download_set.by_browser()</code></h3>
<p>此方法用于设置当前页面对象使用浏览器下载工具下载文件。</p>
<hr />
<h3 id="_15">📌 设置重名文件处理方法</h3>
<p>下载过程中可能遇到保存路径已存在同名文件，<code>DownloadKit</code>提供 3 种处理方法。</p>
<div class="admonition warning">
<p class="admonition-title">注意</p>
<p>这个设置只有在使用<code>DownloadKit</code>作为下载工具时有效。</p>
</div>
<h3 id="download_setif_file_existsrename">🔸 <code>download_set.if_file_exists.rename()</code></h3>
<p>此方式会对新文件进行重命名，在文件名后加上序号。</p>
<p>假如，保存路径已存在<code>abc.txt</code>文件，新的<code>abc.txt</code>文件会自动重命名为<code>abc_1.txt</code>，再下载一个<code>abc.txt</code>时，会命名为<code>abc_2.txt</code>，如此类推。</p>
<p><strong>示例：</strong> 3 次下载同一个文件</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-18-1" name="__codelineno-18-1" href="#__codelineno-18-1"></a><span class="n">page</span><span class="o">.</span><span class="n">download_set</span><span class="o">.</span><span class="n">if_file_exists</span><span class="o">.</span><span class="n">rename</span><span class="p">()</span>
<a id="__codelineno-18-2" name="__codelineno-18-2" href="#__codelineno-18-2"></a><span class="n">page</span><span class="o">.</span><span class="n">download</span><span class="p">(</span><span class="s1">&#39;http://xxxxx/xxx.pdf&#39;</span><span class="p">)</span>
<a id="__codelineno-18-3" name="__codelineno-18-3" href="#__codelineno-18-3"></a><span class="n">page</span><span class="o">.</span><span class="n">download</span><span class="p">(</span><span class="s1">&#39;http://xxxxx/xxx.pdf&#39;</span><span class="p">)</span>
<a id="__codelineno-18-4" name="__codelineno-18-4" href="#__codelineno-18-4"></a><span class="n">page</span><span class="o">.</span><span class="n">download</span><span class="p">(</span><span class="s1">&#39;http://xxxxx/xxx.pdf&#39;</span><span class="p">)</span>
</code></pre></div>
<p>在文件夹会生成如下 3 个文件：</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-19-1" name="__codelineno-19-1" href="#__codelineno-19-1"></a>xxx.pdf
<a id="__codelineno-19-2" name="__codelineno-19-2" href="#__codelineno-19-2"></a>xxx_1.pdf
<a id="__codelineno-19-3" name="__codelineno-19-3" href="#__codelineno-19-3"></a>xxx_2.pdf
</code></pre></div>
<hr />
<h3 id="download_setif_file_existsskip">🔸 <code>download_set.if_file_exists.skip()</code></h3>
<p>遇到同名文件时，跳过。同时任务对象的<code>result</code>属性设置为<code>'skip'</code>。</p>
<p><strong>示例：</strong> 3 次下载同一个文件</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-20-1" name="__codelineno-20-1" href="#__codelineno-20-1"></a><span class="n">page</span><span class="o">.</span><span class="n">download_set</span><span class="o">.</span><span class="n">if_file_exists</span><span class="o">.</span><span class="n">skip</span><span class="p">()</span>
<a id="__codelineno-20-2" name="__codelineno-20-2" href="#__codelineno-20-2"></a><span class="n">page</span><span class="o">.</span><span class="n">download</span><span class="p">(</span><span class="s1">&#39;http://xxxxx/xxx.pdf&#39;</span><span class="p">)</span>
<a id="__codelineno-20-3" name="__codelineno-20-3" href="#__codelineno-20-3"></a><span class="n">page</span><span class="o">.</span><span class="n">download</span><span class="p">(</span><span class="s1">&#39;http://xxxxx/xxx.pdf&#39;</span><span class="p">)</span>
<a id="__codelineno-20-4" name="__codelineno-20-4" href="#__codelineno-20-4"></a><span class="n">page</span><span class="o">.</span><span class="n">download</span><span class="p">(</span><span class="s1">&#39;http://xxxxx/xxx.pdf&#39;</span><span class="p">)</span>
</code></pre></div>
<p>在文件夹只会生成如下 1 个文件：</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-21-1" name="__codelineno-21-1" href="#__codelineno-21-1"></a>xxx.pdf
</code></pre></div>
<hr />
<h3 id="download_setif_file_existsoverwrite">🔸 <code>download_set.if_file_exists.overwrite()</code></h3>
<p>遇到同名文件时，覆盖。</p>
<div class="admonition warning">
<p class="admonition-title">注意</p>
<p>这个方式在多线程下载时要慎用，万一多个任务下载多个同名文件，会导致互相覆盖的现象。</p>
</div>
<div class="admonition tip">
<p class="admonition-title">Tips</p>
<ul>
<li>除了整体设置，还可以在创建任务时单独设置该任务的处理方式。</li>
<li>文件名如遇到<code>'?'</code>、<code>'\'</code>等非法字符，会自动替换为空格。</li>
</ul>
</div>
<hr />
<h3 id="_16">📌 设置大文件是否分块</h3>
<p><code>DownloadKit</code>具备多线程下载大文件功能，在文件超过指定大小时（默认 50MB），可对文件进行多线程分块下载，每个线程负责 50MB 的下载，以提高下载速度。这个功能默认是关闭的，您可以设置是否开启。</p>
<div class="admonition warning">
<p class="admonition-title">注意</p>
<p>这个设置只有在使用<code>DownloadKit</code>作为下载工具时有效。</p>
</div>
<h3 id="download_setsplit">🔸 <code>download_set.split()</code></h3>
<div class="highlight"><pre><span></span><code><a id="__codelineno-22-1" name="__codelineno-22-1" href="#__codelineno-22-1"></a><span class="c1"># 使用分块下载</span>
<a id="__codelineno-22-2" name="__codelineno-22-2" href="#__codelineno-22-2"></a><span class="n">page</span><span class="o">.</span><span class="n">download_set</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="n">on_off</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<a id="__codelineno-22-3" name="__codelineno-22-3" href="#__codelineno-22-3"></a><span class="c1"># 禁用分块下载</span>
<a id="__codelineno-22-4" name="__codelineno-22-4" href="#__codelineno-22-4"></a><span class="n">page</span><span class="o">.</span><span class="n">download_set</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="n">on_off</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
</code></pre></div>
<div class="admonition tip">
<p class="admonition-title">Tips</p>
<p>除了整体设置，还可以在创建任务时单独设置该任务是否使用分块下载。</p>
</div>
<hr />
<h3 id="_17">📌运行参数设置</h3>
<p>运行参数主要包括可使用线程上限、连接失败重试次数、重试间隔。</p>
<h3 id="downloadroads">🔸 <code>download.roads</code></h3>
<p>此参数设置整个<code>DownloadKit</code>对象允许使用的线程数上限，默认为 10。</p>
<p>默认设置下，页面对象最多使用 10 个下载线程，如进程已满，新任务会进入等待队列排队，待有空线程时自动开始。</p>
<p>这个属性只能在没有任务在运行的时候设置。</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-23-1" name="__codelineno-23-1" href="#__codelineno-23-1"></a><span class="n">page</span><span class="o">.</span><span class="n">download</span><span class="o">.</span><span class="n">roads</span> <span class="o">=</span> <span class="mi">20</span>  <span class="c1"># 允许最多使用20个线程进行下载</span>
</code></pre></div>
<hr />
<h3 id="downloadretry">🔸 <code>download.retry</code></h3>
<p>此属性用于设置连接失败时重试次数，默认为 3。</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-24-1" name="__codelineno-24-1" href="#__codelineno-24-1"></a><span class="n">page</span><span class="o">.</span><span class="n">download</span><span class="o">.</span><span class="n">roads</span> <span class="o">=</span> <span class="mi">5</span>  <span class="c1"># 设置连接失败时重试5次</span>
</code></pre></div>
<hr />
<h3 id="downloadinterval">🔸 <code>download.interval</code></h3>
<p>此属性用于设置连接失败时重试间隔，默认为 5 秒。</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-25-1" name="__codelineno-25-1" href="#__codelineno-25-1"></a><span class="n">page</span><span class="o">.</span><span class="n">download</span><span class="o">.</span><span class="n">interval</span> <span class="o">=</span> <span class="mi">10</span>  <span class="c1"># 设置连接失败时等待10秒再重试</span>
</code></pre></div>
<div class="admonition tip">
<p class="admonition-title">Tips</p>
<p>重试次数和间隔在初始化时继承页面对象的<code>retry_times</code>和<code>retry_interval</code>属性，可用上面例子的方法对下载的重试次数和间隔进行设置，设置后不会影响页面对象的设置。</p>
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